/**
 * Copyright 2012 Ricardo Engel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.mookt.dcubed;

import java.io.Serializable;

/**
 * Static utility methods pertaining to {@code Repository} instances.
 * 
 * @author Ricardo Engel
 */
public final class Repositories {

    /**
     * Saves all given entities.
     * 
     * @param entities
     * @return the saved entities
     * @throws IllegalArgumentException in case the given entity is (@literal
     *             null}.
     */
    public static <T extends AggregateRoot<ID>, ID extends Serializable> void save(
            Repository<? super T, ? super ID> repository,
            Iterable<? extends T> entities) {
        for (T entity : entities) {
            repository.save(entity);
        }
    }

    /**
     * Deletes the given entities.
     * 
     * @param entities
     * @throws IllegalArgumentException in case the given {@link Iterable} is
     *             (@literal null}.
     */
    public static <T extends AggregateRoot<ID>, ID extends Serializable> void delete(
            Repository<? super T, ? super ID> repository,
            Iterable<? extends T> entities) {
        for (T entity : entities) {
            repository.delete(entity.getId());
        }
    }

}